Oil-heater.



W. McK. 'STEWART.

on HEATER. APPLICATION FILED DEC-30. I916.

Patented Apia 2 WILLIAM MOKENZIE STEWART, OF TORONTO, ONTARIO, CANADA.

, OIL-:HEATER.

merits.

Specification of Letters Patent.

Patented Apr. 2, 1918..

Applicationfiled necenlber 30, 1916. Serial No. 139,830.

county of York, in the Province ofOr tario, I

Canada, have invented certain new nseful Improvements in Oil-Heaters, ofwhich the following is the specification.

My invention relates to improvements in oil heaters and the object ofthe inventionis to devise a heater of this class which will produce acomplete vaporizationof the oil and prevent the depositing of carbonparticles within the heater and thereby provide a heater having amaximum heatingefiiciency which will be cleanly andodorless and itconsists essentially of the following a1- rangement and construction ofparts as her af e mor p r icularly expl inedy the following specificaton.

Figure a ge Per p cti e view o my epparaw y a lg 1S a v et ona new th euh en ie t emplcy d in ccml ectiq th my heater.

Figs. 3 and bare sectional views of the needle valves employed in my 1device.

th d n lik letter fo f ereeee indicate corresponding parts in the varous figures.

1 indicates a plurality of brackets or other supporting means designed.to be secured within the fire pot of acfiurnace or stove. 2

indicates rectangular vopen vended casing which restsqin an up-ended post onupon the brackets l preferably directly above the ordinary gratebars of a furnace when our ploycd-i ti inec ndicate itb w l rplyrir rliwde W h, a c iatlaol l s va1ve n c te thema ee-sal n pipe provided with acontrolling valve 6. 7 ndi a e r r ftq immew ca e e sion of thepipe 5,:extension leading li 1 p t j he e i eflee ende atits upper end with ahorizontally'extend ing port on 8 leading intothe center front of thecasing thefe'xtreine end tan erinnected bysuitable. elbows to a; furtherverti elbow 10 to an expansion; 'iextendiiig rearwardly across thecasing- 2. ex" n ter as the pipe 7. an expansion tube" of slightlygreatcrcjan eter thanTthe tube 111 and comrades to l the tube 11'-double elbow 13. -l' iindicajtfeslan ex'pa ion n 'er i el teee expansiontube 12. 15 indicates a U-pipe connecting the expansion tubes 12 and 14together.

lGindicates an expansion tube connected to the expansion chamber 14 by aU-pipe 17 and of the same diameter as the expansion tube 14. 18 and 19indicate expansion chambers of the same diameter but of slightlygreaterdiameter than the tubes 16 and 14:. 20 indicates a pipeconnection be tween the expansion tube 16 and the expansion chamber 18.21 indicates a U-pipe connecting the expansion chamber 18to theexpansion chamber 19; 22 indicates a vertical pipe connected at itsupper end by an elbow 23 to the expansion chamber 19. 24

indicates an elbow connecting the lower end of the plpe 22 to a needlevalve casing :26 and 27 indicate the stem and controlling handlerespectively oftheneedle valve. 28 indicates an inverted T-joint, theupwardly extending arm of Whichis connected tothe of which is providedwith horizontal forwardly extending portion 31 connected to the innerend of the horizontal armoi the "T-joint 28. The upper end'of the pipe30 is provided with an extension 32 extending at right angles to theextension 31 and pro- \1 ide d at its end with, a further verticalextension 33 connected to one end of the superheater 29. The oppositeendof the superheater is connected to a depending pipe 3%, the lower endof which is providedwithan "inward extension35 terminating in anupturned portion 36 formingan open burner inouth. '37 indicates acupsurrounding such 'up turned portion 36 designed to befilled withasbestos for a purpose which will hereinafter appear. 38 indicates ahorizontal pipe connectedby a T-joint 39 to the verti- H w cal ipeco;cal extension 9, which isconnected, byan 1 450 I indicates a horizontal,tube extending i paralle1'with the expansion tubes 18 and 19. Theinnerend of the tube 40 is provided iwitlian elbowl'to which isconnecteda i vertical pipe 42, the lower end offwhich is connected by anelb'ow43to the pipe 38. here "inbefore describedi The opposite end'of the "tubeiOj'isjprovided with a Tj oint 44c. "$.45

LT liflii' et f ertiq P n soillltetedlatjii'lis upper end to a nipple 46(see Fig. 2). 47 indicates an injector nozzle extendinginto the T-joint44 in central alinement with the tube 40. The opposite end of the nipple46 is threaded into an internally threaded recess 48 formed in the outerend of the injector nozzle, the injector nozzle 47 being threaded at itsouter end into a head 49 suitably secured within the T-joint 44. TheT-joint 39 is also provided with an injector similar to that abovedescribed and shown in Fig. 2 of the drawings, the nozzle there ofprojecting into the pipe 30. At the lower end of the pipe 45 is provideda needle valve 50, 51 and 52 being the controlling handle and stemthereof respectively. 53 indicates a pipe forming a by-pass duct whichis connected by a T-joint 54 to the pipe 22 intermediately of itsheight. The opposite end of the pipe 53 is connected by a suitable joint54 to the valve casing 50. 55 indicates an elbow connected to theoutwardly projecting arm of the T-44. 56 indicates a pipe depending fromthe elbow 55 and connected by an elbow 57 at its lower end to the pipe 3hereinbefore described.

57 and 58 indicate brackets secured to the front and back walls of thecasing 2 and on which suitable portions-of the pipe structure at theends of the expansion tubes 18 and 19 rest whereby the whole structureis supported by the casing 2 on the brackets 1 in the interior of theturnace or stove.

Having described the principal parts involved in my invention I willbriefly describe the operation of the same.

When starting my apparatus the valve 4 is opened allowing oil to flowthrough the pipe 3 upwardly through the pipe 56 into the pipe 40, thendownward through the pipe 42, through the pipe 38, then upwardly throughthe pipes 30 and 32, through the superheating pipe 29 and from thencedownward through the pipe 34 to the pipe 35 leading to the open mouth ofthe up-turned portion 36, which overflowing saturates the asbestos inthe cup 37. This initial charge of oil is then lighted by the operator,the valve 4 being then closed. The flame thus formed heats the pipe 40causing the oil therein to expand and thus cause the oil to continueflowing out of the mouth of the burner 36 thus providing for thecontinuance of the flame. The valve 6 is then opened allowing water toflow through the pipe 5, up the pipe 7 into the expansion tube 11, whichexpands such water into steam which then passes onwardly through thetubes 12, 14, 16, 18 and 19 gradually expanding the steam into vapor,which passes down through the pipe 22. Part of this flow of steam passesthrough the pipe 53 to the valve, 50, the other portion continuing ondown. the pipe 22 to the valve '25. The valve 50 is then opened allowinga chargeof steam to pass through the injector nozzle of the T-joint 44and to be ejected into the charge of oil previously .fed into the pipe40. The valve 4 is then again opened to the required extent.

It may be stated that oil will not thoroughly mix with the large volumeof steam forced thereinto and will, therefore, cause carbon deposits toform on the walls of the tubes. By injecting a small quantity of steaminto the oil a thorough mixture is provided, which is fully vaporizedand passes on without any carbon deposit. The mixture so formed passesdown through the pipe 42, and through the pipe 38. The

valve 25 is then opened allowing the main I have devised a very simpleform of oil burning apparatus in which all oil particles are thoroughlyseparated into vapor so that when such vapor arrives in the form of gasat the burner nozzle a maximum efliciency is derived therefrom, also bythe injection of a small quantity of steam into the oil as abovedescribed all liability for the oil to carbonize on the interior wallsof the tubes and pipes is avoided thereby providing a heater of maximumeificiency, which will be clean and obviate any danger of smell.

If desired the upper portion of the casing above the brackets 57 and 58and around the expansion tubes 18, 19, 16, 14, 11 and 12 andsuperheating pipes 29 may be filled with asbestos fuel, which therebyaids to retain the heat around such pipes and aids in producing thenecessary heat for vaporizing the oil.

What I claim as my invention is:

1. In an oil burning heater, an oil chamher, an oil supply pipe, a watersupply pipe,

a burner, a pipe connection between the oil chamber and the burner, apipe connection between the oil supply pipe and oil chamher, anexpansion chamber element, a pipe connection between the water supplypipe and such element, a discharge pipe from the expansion elementhaving branches, one branch leading into the pipe extending from the oilchamber to the burner and the other branch extending directly to the oilchamber, and controlling valves for'each branch.

2. In anoil burning heater, an oil cha1nher, an oilsupply pipe, a watersupply pipe and burner, a pipe-connection betweenthe oil,

chamber and the burner, a pipe connection between the oil supply pipeand'oil chamber,

From this description it will be seen that an expansion chamber element,a pipe connection between the Water supply pipe and such element, adischarge pipe from the expansion element having branches, one branchleading into the pipe extending from the oil chamber to the burner andthe other branch extending directly to the oil chamber, controllingvalves for each branch, an injector nozzle located in the end of the oilchamber and to which the pipe leading thereto is connected, and aninjector nozzle located in the end of the branch and extending into thepipe leading from the oil chamber to the burner.

3. In an oil burning heater, the combination with an oil supply pipe andWater supply pipe and burner, of a series of ducts for carrying the oilfrom the oil supply pipe to the burner, means for vaporizing the Water,

means for injecting a portion of such vapor ized charge of Water intothe oil fed to the burner, means for subsequently mixing the vaporizedoil and Water vaporvvith the main body of the vaporized Water andfinally conveying such mixture to the burner, a casing having open upperand lower ends surrounding the aforesaid apparatus, supporting bracketssecured Within the casing on which the aforesaid apparatus rests, andsupporting means for the casing adapted to be secured i to the fire potof the furnace.

WILLIAM MCKENZIE STEWART.

Witnesses M. EGAN, E. Lowns.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

